US3832109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sprue sealer
Assignee: Structural Fibers Inc
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Filing: 1973-05-10
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Granted: 1974-08-27
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Expires: 1993-05-10
Abstract
Abstract A sprue or resin drain closure assembly for use in apparatus employed to mold resin impregnated fiber articles is disclosed. Part of the assembly also serves as a device for removing molded articles from the mold. According to the invention, a stop or anvil is spaced laterally from a closure head, and the head is axially movable toward the stop. Movement of the head toward the stop seals a flexible extension of a sprue insert disposed therebetween. The stop may be pivoted away to permit the removal of the flexible extension from the sprue insert and the connection of a fluid supply thereto for providing a mold removal lifting force on the molded article through the sprue opening.
Inventors
- 👤 H Ranallo
- 👤 Breton E Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:16
CPC Classifications
B; B29; B29C; B29C33/00; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/44; B29C70/443; B29C43/00; B29C43/02; B29C43/10; B29C43/12; B29L; B29L2031/00; B29L2031/712; B29L2031/7126; Y; Y10; Y10S; Y10S425/00; Y10S425/019
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
106 words
In a molding press, for producing molded, fiber-reinforced resin articles, comprising: a. a mold having an inner mold cavity wall defining the outside shape of the molded article; b. a flexible envelope within said cavity defining the inside shape of the mold articles and adapted to apply molding pressure to said articles during a molding operation; c. a resin inlet through said mold wall; and d. a sprue opening through said mold wall; the improvement comprising a flexible tubular extension fixed to said sprue opening and in fluid communication therewith, and compression means for deforming and closing said flexible extension to thereby close said spure opening.
Claim 2
Dependent Claim
106 words
In a molding press, for producing molded, fiber-reinforced resin articles, comprising: a. a mold having an inner mold cavity wall defining the outside shape of the molded article; b. a flexible envelope within said cavity defining the inside shape of the mold articles and adapted to apply molding pressure to said articles during a molding operation; c. a resin inlet through said mold wall; and d. a sprue opening through said mold wall; the improvement comprising a flexible tubular extension fixed to said sprue opening and in fluid communication therewith, and compression means for deforming and closing said flexible extension to thereby close said spure opening.
Claim 3
Dependent Claim
87 words
The improvement according to claim 1 wherein said compression means includes an anvil having a face adjacent to a portion of the extension to be deformed and closed, a closure head of the other side of said tubular extension and spaced laterally from said head, and power means operable to laterally force said closure head into said other side of said tubular extension while the opposite side of said tubular extension is held stationary by said anvil, causing the collapse of the inner bore of said extension.
Claim 4
Dependent Claim
15 words
The improvement according to claim 2 wherein said power means comprises a fluid operated piston.
Claim 5
Dependent Claim
38 words
The improvement according to claim 3 wherein said aNvil has a face abutting said extension and wherein said face has projecting fingers straddling said tubular extension to prevent deflection of the extension upon compression by said closure head.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |